Objective Physics and MCQ Question

Objective Physics and MCQ Question for Entrance, Competitive Exam

1. 
   

   If a charge flows through a resistor, which of the following happens to the resistor?

1. A. It gets colder     
2. B. It gets hotter        Correct Answer
3. C. It becomes positively charged      
4. D. Nothing      

2.  

   
   

   In a filament lamp, in what form is most of the energy lost?

1. A. Heat       Correct Answer
2. B. Sound      
3. C. Kinetic energy      
4. D. Radio waves      

3.  

   
   

   What is power?

1. A. The number of repetitions of squats a body-builder can perform.     
2. B. The number of cylinders in a car.      
3. C. The rate at which energy is absorbed.      
4. D. The rate at which energy is transferred.        Correct Answer

4.  

   
   

   Calculate the power of an appliance that uses 1000 joules of energy in 5 seconds.

1. A. 100 W     
2. B. 200 W        Correct Answer
3. C. 300 W      
4. D. 400 W      

5.  

   
   

   Which equation correctly shows the relationship between energy transferred, voltage and charge?

1. A. E = V x Q       Correct Answer
2. B. E = 2V x Q      
3. C. E = V / Q      
4. D. E = Q / V      

6.  

   
   

   What is the current through a circuit which contains three resistors of size 3 Ω, 5 Ω and 7 Ω respectively which are placed in series when a potential difference of 12 V is applied?

1. A. 0.8 A       Correct Answer
2. B. 1 A      
3. C. 2 A      
4. D. 10 A      

7.  

   
   

   If the voltage in a circuit remains constant but the resistance is increased, what will happen to the current?

1. A. Current decreases       Correct Answer
2. B. Current increases      
3. C. Current remains the same      
4. D. Values for the voltage and resistance are required to answer this