Current Electricity Test

Result

Current Electricity Test - 129

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

Two wires of the metal have the same length but their cross-sections are in the ratio 3:1 They are joined in series: The resistance of the thicker wire is 10 Ω. The total tesistance of the combination will be

A
40

B

C

D
100

Solution
Question 2
4 / -1

A wire of length L is drawn such that its diameter is reduced to half of its original diameter. If the resistance of the wire were 10Ω, its new resistance would be

A
40 Ω

B
60 Ω

C
120 Ω

D
160 Ω
Question 3
4 / -1

Which of the following has negative temperature coefficient of resistance?

A
Fe

B
C

C
Mn

D
Ag
Question 4
4 / -1

A parallel combination of three resistors takes a current of 7.5 A form a 30 V supply, It the two resistors are 10 Ω and 12 Ω find which is the third one?

A
4 Ω

B
15 Ω

C
12 Ω

D
22 Ω

Solution
Question 5
4 / -1

A potentiometer wire has length 10 m and resitance 20Ω. A 2.5V battery of negligble internal resistance is connected across the wire with an 80Ω series resistance. The potential gradient on the wire will be:

A

B

C

D

Solution
Question 6
4 / -1

The drift velocity of free electrons through a conducting wire of radius r, carrying current I, is if the same current is passed through a conductor of radius 2r what will be the drift velocity?

A

B

C

D

Solution
Question 7
4 / -1

A carbon resistor has a set of coaxial coloured rings in the order brown, violet brown and silver. The value of resistance (in ohms) is

A

B

C

D
Question 8
4 / -1

A cross a wire of length l and thickness d, a p.d of V is applied. If the p.d is doubled the dirft velocity becomes....

A
becomes double

B
becomes half

C
Close not change

D
becomes Zero

Solution
Question 9
4 / -1

The masses of three wires of copper are in the ratio of 1:3:5 and their lengths are in the ratio of 5:3:1. The ratio of their electrical resistance is:

A
1 : 1 : 1

B
1 : 3 : 5

C
5 : 3 : 1

D
125 : 15 : 1

Solution
Question 10
4 / -1

Two resistors when connected in parallel have an equivalent of 2Ω and when in series of 9Ω The values of the two resistors are.

A
2 Ω and 9 Ω

B
3 Ω and 6 Ω

C
4 Ω and 5 Ω

D
2 Ω and 7 Ω

Solution