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Workshop Calculation and Sci- 1 Yr Module 7 - Basic Electricity

Total questions: 35

Worksheet time: 18mins

Name
Class
Date
1.
Which machine converts mechanical energy into electrical energy?
a)
Battery
b)
Generator
c)
Heater
d)
Iron box
2.
Which is the unit of current?
a)
Ampere
b)
Volt
c)
Ohm
d)
Watt
3.
Which is the unit of resistance?
a)
Ampere
b)
Volt
c)
Ohm
d)
Watt
4.
What is the flow of electrons in any conductor?
a)
Voltage
b)
Current
c)
Resistance
d)
Power
5.
Which property of a substance is opposing the flow of electric current?
a)
Current
b)
Voltage
c)
Resistance
d)
EMF
6.
Which is very good conductor?
a)
Copper
b)
Cast iron
c)
Wrought iron
d)
Steel
7.
Which is mineral insulator?
a)
Glass
b)
Quartz
c)
Mica
d)
Porcelain
8.

What is the total resistance if three resistances of 3 ohms, 9 ohms and 5 ohms are connected in series?

a)
11 ohms
b)
7 ohm
c)
17 ohms
d)
1/17 ohms
9.
What is the total resistance if two resistances of 4 ohms and 6 ohms are connected in parallel?
a)

2.410\frac{2.4}{10}  

b)

2410\frac{24}{10}  

c)

1024\frac{10}{24}  

d)

102.4\frac{10}{2.4}  

10.
What is the total resistance if three resistances of 4 ohms, 6 ohms and 8 ohms respectively are connected in parallel?
a)
24
b)
13
c)

2413\frac{24}{13}  

d)

1324\frac{13}{24}  

11.
Which is same in series connection of resistors in a circuit?
a)
Current
b)
Voltage
c)
Resistance
d)
Power
12.
Which law states that at constant termperature the current passing through a closed circuit is directly proportional to the potential difference and inversely proportional to the resistance?
a)
Ohm's law
b)
Lenz's law
c)
Newton's law
d)
Hooke's law
13.

What is the resistance?

I = 11.5 Amps

V = 380 Volts

R = _________Ohms

a)
13 ohms
b)
23 ohms
c)
33 ohms
d)
43 ohms
14.

What is the current?

R = 50 Ohms

V = 200 Volts

I = _________Amps

a)
4.1 Amps
b)
4.2 Amps
c)
4.3 Amps
d)
4.4 Amps
15.

What is the voltage?

R = 250 Ohms

I = 0.44 Amps

V =_____Volts

a)
100 Volts
b)
105 Volts
c)
108 Volts
d)
110 Volts
16.
Which statement is correct according to ohm's law?
a)

I∝1VI\propto\frac{1}{V}  

b)

I∝RI\propto R  

c)

I∝VRI\propto\frac{V}{R}  

d)

I∝RVI\propto\frac{R}{V}  

17.
What is the filament resistance if a 6 volt bulb draws a current of 0.5 Amps?
a)
12 
b)
10 
c)
3 
d)
1.2 
18.
How much watt second in 1 watt hour?
a)
1000 watt sec
b)
2000 watt sec
c)
3600 watt sec
d)
4000 watt sec
19.
What is the power if an emf of one volt causes a current flow of 1ampere?
a)
1 watt
b)
1 kilowatt
c)
1 HP
d)
1 Kilowatt hour
20.
Which is equal to electric power?
a)

R²I watts

b)

I²R watts

c)

R2I\frac{R^2}{I}  watts

d)

I2R\frac{I^2}{R}  watts

21.
How much power does it consumes if an electric heater draws a current of 10 amps at 200 volts?
a)
2000 watts
b)
2010 watts
c)
2020 watts
d)
2030 watts
22.
What is the resistance of an electric iron if the rating of electric iron is 220 V and 500 watts?
a)
94.8 ohms
b)
95.8 ohms
c)
96.8 ohms
d)
97.8 ohms
23.

What is the voltage of the immersion heater?

P = 500 watts

I = 2.27 Amps

V = ______Volts

a)
200.3 volts
b)
210.3 volts
c)
220.3 volts
d)
230.3 volts
24.
What is the unit of intensity of magnetic field?
a)
wb/m
b)
m/wb
c)
Hertz
d)
Coloumb
25.
Which law states about electromagnetic induction?
a)
Ohm's law
b)
Hooke's law
c)
Lenz's law
d)
Faraday's law
26.
What is the formual for induced emf?
a)

B²L sin⁡θ\sin\theta   volts

b)

BL sin⁡θ\sin\theta   volts

c)

BLV sin⁡θ\sin\theta   volts

d)

B²V sin⁡θ\sin\theta   volts

27.
What does EMF stands for?
a)
Electronic Magnetic Force
b)
Electro Motive Force
c)
Electro Magnetic Force
d)
Electromated Force
28.
Which is the example for statically induced emf?
a)
Generator
b)
Motor
c)
Transformer
d)
Refrigerator
29.
Which is the example for dynamicallly induced Emf?
a)
Motor
b)
Generator
c)
Car
d)
Motor bike
30.
Which is the unit electrical power?
a)
Volts
b)
Ohms
c)
Watts
d)
Ampere
31.

What is the current Flow in the bulb?

P = 550 watts

R = 22 Ohms

I = ______Amps

a)
2 Amps
b)
3 Amps
c)
4 Amps
d)
5 Amps
32.

What is the power required?

I = 0.455 Amps

R = 484 Ohms

P = _____Watts

a)
98.2 watts
b)
99.2 watts
c)
100.2 watts
d)
101.2 watts
33.
What is the rated power if an adjustable resistor bears the following label 1.5 k ohms/ 0.08A?
a)
9.2 watts
b)
9.4 watts
c)
9.6 watts
d)
9.8 watts
34.
How much voltage will be required to illuminate a 40 watts fluorescent lamp draws a current of 0.10 amperes?
a)
390 volts
b)
395 volts
c)
400 volts
d)
405 volts
35.

How many hours will take for a 100 watts bulb to consume 1 kwh energy?

W = 1 Kwh

P = 100 Watts

t = ______Hours

a)
10 hours
b)
12 hours
c)
18 hours
d)
24 hours

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