Workshop Calculation and Science

Year 1 Module 7

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 :
B :
C :
D :

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 :
D :

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 temperature 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
220 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  100  
B : 105 Volts  105  
C : 108 Volts  108  

D : 110 Volts  110  

16: Which statement is correct according to ohm´s law
A : I µ 1/V
B : I µ R  

C : I µ V/R  
D : I µ R/V  

17: What is the filament resistance if a 6 volt bulb draws a current of 0.5 Amps  

A : 12 W  
B : 10 W  
C : 3 W  
D : 1.2 W  

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 :
D :

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  200.3  
B : 210.3 volts  210.3  

C : 220.3 volts  220.3  
D : 230.3 volts  230.3  

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 formula for induced emf         
A : B2L sinq volts 
B : BL sinq volts 

C : BLV sinq volts 
D : B2V sinq volts 

27: What does EMF stands for  
A : Electronic Magnetic Force  

B : Electro Motive Force     
C : Electro Magnetic Force   
D : Electroplated Force    

28: Which is the example for statically induced emf       
A : Generator  
B : Motor  

C : Transformer  
D : Refrigerator  

29: Which is the example for dynamically 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  2
B : 3 Amps  3
C : 4 Amps  4

D : 5 Amps  5

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