A neon flashlight cell with an emf of 1.5V gives a current of 15A when connected directly to an ammeter of resistance 0.04?. Internal resistance of the cell is
1.0.0004?
2.0.06?
3.0.10?
4.0.13?
Posted Date:-2021-08-31 09:38:58
All electrical appliances are connected in parallel to each other between the main line and neutral wire to get
1.same current
2.same current and potential difference
3.different current but same potential difference
4.different current and potential differences
Posted Date:-2021-08-31 09:38:58
Electrical energy is measured in
1.watt
2.horse power
3.kilo watt
4.kilowatt hour
Posted Date:-2021-08-31 09:38:58
If 1 ampere current flows through 2m long conductor the charge flow through it in 1 hour will be
1.3600C
2.7200C
3.1C
4.2C
Posted Date:-2021-08-31 09:38:58
Internal resistance is the resistance offered by
1.source of e m f
2.conductor
3.resistor
4.capacitor
Posted Date:-2021-08-31 09:38:58
Reciprocal of resistivity is called
1.resistance
2.inductance
3.conductivity
4.flexibility
Posted Date:-2021-08-31 09:38:58
Resistance between points A and B in the circuit shown in figure is
1.4?
2.6?
3.10?
4.8?
Posted Date:-2021-08-31 09:38:58
Terminal potential difference of a battery is greater than its emf when
1. the internal resistance of battery is infinite
2.the internal resistance of battery is zero
3.the battery is charged
4.the battery is discharged
Posted Date:-2021-08-31 09:38:58
Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains?
1.40 W bulb
2.60 W blub
3.100 W blub
4.all will burn equally brightly
Posted Date:-2021-08-31 09:38:58
Which one of the following materials is useful for making bulb filaments?
1.constantan
2.nichrome
3.copper
4.tungsten
Posted Date:-2021-08-31 09:38:58
A wire having very high value of conductance is said to be
1.very good conductor
2.moderately good conductor
3.an insulator
4.no specific criterion available
Posted Date:-2021-08-31 09:38:58
A wire of uniform area of cross-section A length L and resistance R is cut into two parts. Resistivity of each part
1.remains the same
2.is doubled
3.is halved
4.becomes zero
Posted Date:-2021-08-31 09:38:58
An immersion heater of 400 watts kept on for 5 hours will consume electrical power of
1.2KWh
2.20KWh
3.6KWh
4.12KWh
Posted Date:-2021-08-31 09:38:58
How much heat does a 40 W bulb generates in one hour?
1.144000J
2.144J
3.1.44J
4.14J
Posted Date:-2021-08-31 09:38:58
In liquids and gases the current is due to the motion
1.negative charges
2. positive charges
3.both negative and positive charges
4.neutral particles
Posted Date:-2021-08-31 09:38:58
One kilowatt hour is the amount of energy delivered during
1.one second
2.one day
3.one minute
4.one hour
Posted Date:-2021-08-31 09:38:58
Production of heat due to an electric current flowing through a conductor is given by
1.Joule effect
2.Joule Thomsons effect
3.Comptons effect
4.Feed back effect
Posted Date:-2021-08-31 09:38:58
Resistance of a super conductor is
1.finite
2.infinite
3.zero
4.changes with every conductor
Posted Date:-2021-08-31 09:38:58
Resistance of a wire on increasing its temperature will
1.increase with rise in temperature
2.decrease with rise in temperature
3. will remain same
4.depends upon altitude of experimentation
Posted Date:-2021-08-31 09:38:58
Specific resistance of a wire
1. will depend on its length
2.will depend on its radius
3.will depend on the type of material of the wire
4.None
Posted Date:-2021-08-31 09:38:58
The current in the circuit shown in figure - What will be the current in the circuit?
1.1/45A
2.1/10A
3.1/5A
4.5A
Posted Date:-2021-08-31 09:38:58
The current through a metallic conductor is due to the motion of
1.free electrons
2.protons
3.neutrons
4.still under controversy
Posted Date:-2021-08-31 09:38:58
The graphical representation of Ohms law is
1.hyperbola
2.ellipse
3.parabola
4.straight line
Posted Date:-2021-08-31 09:38:58
Thermocouples convert
1.heat energy into electrical energy
2.heat energy into light energy
3.heat energy into mechanical energy
4.mechanical energy into heat energy
Posted Date:-2021-08-31 09:38:58
When 2? 4? and 6? resistor are connected in parallel their resultant equivalent resistance will be
1.12?
2.11/12?
3.12/11?
4.data is insufficient
Posted Date:-2021-08-31 09:38:58
When same current passes for same time through a thick and thin wire
1.more heat is produced in thick wire
2.more heat is produced in thin wire
3.no heat is produced in wire
4.less heat is produced in thick wire
Posted Date:-2021-08-31 09:38:58
A fuse is placed in series with the cireuit to protect against
1.high power
2.high voltage
3.high current
4.over heating
Posted Date:-2021-08-31 09:38:58
An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be
1.12
2.24
3.5
4.1100
Posted Date:-2021-08-31 09:38:58
Circuit which gives continuously varying potential is called
1.complex network
2.wheat stone bridge
3. potential divider
4.all of above
Posted Date:-2021-08-31 09:38:58
Electrical energy is converted to heat at the rate of
1.IRt
2.I2R
3.I2Rt
4.Vit
Posted Date:-2021-08-31 09:38:58
In the following figure the terminal potential is
1.zero
2.2V
3.12V
4.36V
Posted Date:-2021-08-31 09:38:58
Resistance of a conductor depends upon
1.nature of conductor
2.dimension of conductor
3.physical state of the conductor
4.all of above
Posted Date:-2021-08-31 09:38:58
Resistance of an ideal insulator is
1.infinite
2.zero
3.finite
4.depends upon nature
Posted Date:-2021-08-31 09:38:58
The resistance of a conductor at absolute zero (OK) is
1.zero almost
2. infinite almost
3.no prediction at all
4.may increase or decrease
Posted Date:-2021-08-31 09:38:58
There are three bulbs of 60W 100W and 200W which bulb has thickest filament.
1.100W
2.200W
3.60W
4.all
Posted Date:-2021-08-31 09:38:58
Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f?A. B. 90WC. 100W D. 120W
1.40 W
2.90
3.100
4.120
Posted Date:-2021-08-31 09:38:58
Which one is the best material for making connecting wires?
1.iron
2.tungsten
3.silver
4.copper
Posted Date:-2021-08-31 09:38:58
Which one of the following bulbs has the least resistance?
1.100 watt
2.200 watt
3.300 watt
4.60 watt
Posted Date:-2021-08-31 09:38:58
Why should a resistance be introduced in a circuit in series deliberately?
1. to increase current
2.to decrease current
3.to control current
4.just to give a good look to circuit
Posted Date:-2021-08-31 09:38:58