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NTSE Current Electricity

Total questions: 31

Worksheet time: 52mins

Name
Class
Date
1.
The two types of current are...
a)
AC/DC
b)
Alternating Current
c)
Direct Current
d)
All of the above
2.
A light bulb is an example of a _______.
a)
current
b)
resistor
c)
battery
3.
Electrical energy is converted to _______ energy in a hair dryer.
a)
heat 
b)
light
4.

A device that converts chemical energy into electrical energy is call a

a)

battery

b)

conductor

c)

parallel circuit

d)

flashlight

5.

A current 1.5 A is drawn by an electric bulb for 10 min, then the amount of electric charge is

a)

300 C

b)

400 C

c)

900 C

d)

1000 C

6.

A charge of 500 C flows through a bulb for 5 min, then the amount of current flowing through the circuit is

a)

20 A

b)

500 A

c)

10 A

d)

1.6 A

7.

An electric iron of resistance 20 Ω and takes current of 5 A, then the Heat developed in 30 seconds

a)

25000 J

b)

15000 J

c)

1500 J

d)

2500 J

8.

An electric iron box rated 750 W Operated for 2 hours per day, if the cost of unit Is Rs 3.00 per kWh, then the cost of energy used to operate electric iron box for 30 days is

a)

Rs 125

b)

Rs 308

c)

Rs 135

d)

Rs 185

9.
The current going through the 45 ohm resistor is 
a)
0.05 amps
b)
0.2 amps
c)
0.1 amps
d)
5 amps
10.

What is the total resistance (RT) across this circuit?

a)

3 kΩ

b)

10 kΩ

c)

13 kΩ

d)

18 kΩ

11.
The voltage dropped across the 300 ohm resistor is 
a)
6 V
b)
9 V
c)
2 V
d)
30 V
12.
The total current through this circuit is
a)
0.02 amps
b)
0.09 amps
c)
50 amps
d)
9 amps
13.
The picture shows an electrical circuit. This circuit is a series circuit because: 
a)
It has 3 light bulbs.
b)
The same current flows through all three light bulbs.
c)
It uses a single battery.
d)
The electrical current is divided between the three light bulbs.
14.
A Charging system producing 14.5 Volts with a current flow of 43.5 Amps, what is the circuit resistance
a)
58 Amps
b)
0.33 Amps
c)
13 Amps
d)
1 Amp
15.
When more branches are added to a parallel circuit, ____________________.
a)
resistance decreases
b)
voltage increases
c)
nothing changes
16.

Calculate the voltage applied when a 60 watt light-bulb uses a current of 5 amps

a)

300 volts

b)

30 volts

c)

12 volts

d)

0.08 volts

17.

Work of 24 J is done in a moving 4 C ( coulomb )of charge between two points on a conductor wire , then the potential difference between two points is

a)

24 V

b)

6 V

c)

0.6 V

d)

14 V

18.

In the given combination of resistance , the effective resistance across A and B

a)

5 Ω

b)

7 Ω

c)

13 Ω

d)

16 Ω

19.

The electrical resistivity of silver is 1.60 x 10-6 m what will be the resistance of silver wire of length 2 m and cross section 2 x 10 -3 m2 ?

a)

8 x 10 -3 Ω

b)

1 x 10-3 Ω

c)

6 x 10-3 Ω

d)

1.60 x 10 -3 Ω

20.

An electric bulb is connected to a 240 V generator , The current drawn is 0.25 A. Then the power of the bulb is

a)

60 W

b)

600 W

c)

0.6 W

d)

24 W

21.

An electric iron box rated 750 W Operated for 2 hours per day, if the cost of unit Is Rs 3.00 per kWh, then the cost of energy used to operate electric iron box for 30 days is

a)

Rs 125

b)

Rs 308

c)

Rs 135

d)

Rs 185

22.

A bulb marked 220 V, 40 W, calculate current flowing through the bulb and its resistance

a)

1210 ohm, 0.18 A

b)

1200 ohm, 1.8 A

c)

121 ohm, 0.18 A

d)

1200 ohm, 0.18 A

23.

An electric iron of resistance 20 Ω and takes current of 5 A, then the Heat developed in 30 seconds

a)

25000 J

b)

15000 J

c)

1500 J

d)

2500 J

24.
What does the Greek letter Ω,  (i.e. Omega) represent?
a)
amps
b)
volts
c)
watts
d)
ohms
25.
What is the voltage across the bottom lamp?
a)
3 V
b)
6 V
c)
12 V
d)
18 V
26.

A charge of 500 C flows through a bulb for 5 min, then the amount of current flowing through the circuit is

a)

20 A

b)

500 A

c)

10 A

d)

1.6 A

27.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
28.

What is a parallel circuit?

a)

a continuous loop

b)

a circuit with one path

c)

a circuit with multiple branches for each individual appliance or light

29.
What is the power of a 20V bulb with 5A through it?
a)
100W
b)
100V
c)
6.3W
d)
6.3A
30.

What is the power of the circuit?

a)

0.33 W

b)

3 W

c)

8 W

d)

12 W

31.

What is the energy of the circuit if it is running for 40 seconds?

a)

0.3 J

b)

3.3 J

c)

120 J

d)

480 J

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