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Worksheets

W/S CALCULATION & SCIENCE

Total questions: 25

Worksheet time: 1hrs 15mins

Name
Class
Date
1.

If a lamp is labelled 250W/5A, then rated voltage will be _____

a)

50V

b)

100V

c)

150V

d)

250V

2.

A voltage of 220V is connected across a 1 K ohms resistor.The power consumption of lamp is ________

a)

48.1W

b)

48.2W

c)

48.3W

d)

48.4W

3.

ohm's law is the relation between voltage(V), current(I) and resistance(R), according to which,______

a)

I=V/R

b)

V=I/R

c)

I=VR

d)

R=I/V

4.

Given that voltage ( V ) = 3.6V & current (I)=0.2A. The resistance (R) by using Ohm's law is _____

a)

0.18Ω

b)

1.8Ω

c)

18Ω

d)

20Ω

5.

The unit of current is Ampere. It is measured by_______

a)

Ammeter

b)

voltmeter

c)

ohmmeter

d)

Frequency meter

6.

Electricity is a kind of ______

a)

Heat

b)

Energy

c)

Magnet

d)

Chemical

7.

"Electric current" is classified as Direct current ( DC ) and _______

a)

Magnetic current

b)

Heating current

c)

Alternating current

d)

Chemical current

8.

Resistance is the property of a substance due to which it opposes the flow if electric current. It's unit is ________

a)

Ohm

b)

Volt

c)

Ampere

d)

emf

9.

Find the main supply Voltage (V) of iron box in Volt, if coil Resistance (R) =150Ω, Current I = 0.733A

a)

55V

b)

100V

c)

110V

d)

220V

10.

A 6V bulb needs 0.5A current, find the resistance R.

a)

12Ω

b)

10Ω

c)

d)

1.2Ω

11.

Resistance of a conductor increases when

a)

Specific resistance of the conductor decreases

b)

Length of the conductor increases

c)

Cross-sectional area of conductor decreases

d)

Conductivity of the wire increases

12.

What will be the value of resistance (R) If Current (I) = 0.12A and Voltage (V) = 88V

a)

733Ω

b)

684Ω

c)

514Ω

d)

136Ω

13.

_________ can help Electicity to flow one point to another

a)

Magnetic force

b)

Electro motive force

c)

Electric force

d)

Gravitational force

14.

In a series circuit, the current in each resistance remains _______

a)

Less

b)

More

c)

Double

d)

Same

15.

Flow of electron is from _____ terminal to _____ terminal

a)

Positive, Negative

b)

Positive, Positive

c)

Negative, Positive

d)

Negative, Negative

16.

Direction and magnitude of ________ current changes instant to instant

a)

Direct from

b)

Dynamic

c)

Static

d)

Alternating

17.

Direction and magnitude of ____ current is constant

a)

Direct

b)

Dynamic

c)

Static

d)

Alternating

18.

Voltmeter is connected in ______ connection.

a)

Series

b)

Unitary

c)

Parallel

d)

None of the above

19.

Flow of electrons in a conductor is called ______

a)

Power

b)

Temperature co efficient

c)

Electric current

d)

Resistance

20.

_______ Is the force responsible for the flow of current from 1 end to Other end in a conductor

a)

Electric voltage

b)

Potential difference

c)

Resistance

d)

Electro motive force

21.

The force due to which electrons flow in a circuit is called ________

a)

Electric voltage

b)

Electro motive force

c)

Electric current

d)

Potential difference

22.

The rate at which electrical work is done in an electric circuit is called _______

a)

Electrical power

b)

Electric energy

c)

Work

d)

Force

23.

Determine the current flowing in a bulb if power P = 60 W and voltage V= 220V

a)

1.32 A

b)

0.46A

c)

0.37A

d)

0.27A

24.

A 60 watt bulb is connected to a voltage of 240V. Find the current flowing in the circuit in Amperes.

a)

4A

b)

1.5A

c)

0.25A

d)

0.025A

25.

Find the resistance of electric kettle of 2000 W and 220 V

a)

24.2Ω

b)

23.5Ω

c)

10.5Ω

d)

11.2Ω