Current Electricity Test

Result

Current Electricity Test - 152

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Weekly Quiz Competition

Question 1
4 / -1

A 60 watt bulb carries a current of 0.5 amp. The total charge passing through it in 1 hour is

A
3600 coulomb

B
3000 coulomb

C
2400 coulomb

D
1800 coulomb

Solution
Question 2
4 / -1

Two conductors made of the same material are connected across a common potential difference. Conductor A has twice the diameter and twice the length of conductor B. The power delivered to the two conductors P_A and P_B respectively is such that P_A/P_B equals to

A
0.5

B
1.0

C
1.5

D
2.0

Solution
Question 3
4 / -1

A heating coil can heat the water of a vessel from 20° C to 60° C in 30 minutes. Two such heating coils are put in series and then used to heat the same amount of water through the same temperature range. The time taken now will be (neglecting thermal capacity of the coils)

A
60 minutes

B
30 minutes

C
15 minutes

D
7.5 minutes

Solution
Question 4
4 / -1

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

A
0.1 watt

B
1 watt

C
10 watt

D
100 watt

Solution
Question 5
4 / -1

Two resistors having equal resistances are joined in series and a current is passed through the combination. Neglect any variation in resistance as the temperature changes. In a given time interval

A
Equal amounts of thermal energy must be produced in the resistors

B
Unequal amounts of thermal energy may be produced

C
The temperature must rise equally in the resistors

D
The temperature must rise unequally in the resistors

Solution
Question 6
4 / -1

Watt-hour metre measures

A
Electric energy

B
Current

C
Voltage

D
Power
Question 7
4 / -1

Pick out the wrong statement

A
In a simple battery circuit, the point of lowest potential is the negative terminal of the battery

B
The resistance of an incandescent lamp is greater when the lamp is switched off

C
An ordinary 100 W lamp has less resistance than a 60 W lamp

D
At constant voltage, the heat developed in a uniform wire varies inversely as the length of the wire used
Question 8
4 / -1

Two resistors of 6 Ω and 9 Ω are connected in series to a 120 volt source. The power consumed by the 6 Ω resistor is

A
384 W

B
576 W

C
1500 W

D
1200 W

Solution
Question 9
4 / -1

If 2.2 kW power is transmitted through a 100 Ω line at 22000 V, the power loss in the form of heat will be

A
0.1 W

B
1 W

C
10 W

D
100 W

Solution
Question 10
4 / -1

A 4µF conductor is charged to 400 volts and then its plates are joined through a resistance of 1k Ω. The heat produced in the resistance is

A
0.16 J

B
1.28 J

C
0.64 J

D
0.32 J

Solution