Discussion
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- Question
The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. What current will the heater draw if the potential difference is increased to 127.5 V ?
Options- A. 8.5 A
- B. 24 A
- C. 10 A
- D. 12 A
- Correct Answer
- 8.5 A
- 1. The energy obtained from atoms is known as.........
Options- A. Solar energy
- B. Heat energy
- C. Nuclear energy
- D. Chemical energy Discuss
- 2. An electric iron of 750 W is used for S hours per day. Then the energy consumed in one day by the iron is:
Options- A. 6 units
- B. 600 units
- C. 0.6 units
- D. 60 units Discuss
- 3. The absolute refractive index of any medium is always:
Options- A. more than one
- B. 0
- C. 1
- D. less than one Discuss
- 4. If price of an article decreases from P1 to Rs 25, quantity demanded increases from 900 units to 1200 units. If point elasticity of demand is 2 find P1?
Options- A. Rs. 20
- B. Rs. 30
- C. Rs. 25
- D. Rs. 35 Discuss
- 5. What is the effective resistance (in ?) of two resistors 20 ? and 30 ? connected in parallel?
Options- A. 50
- B. 12
- C. 24
- D. 36 Discuss
- 6. The magnitude of buoyant force depends on the .......... of the fluid.
Options- A. mass
- B. temperature
- C. volume
- D. density Discuss
- 7. The force exerted on an object is 200 N and its mass is 100 kg. Find the acceleration of the object.
Options- A. 2 m/s
- B. 2 m
- C. 2 m/sq.s
- D. 2 s Discuss
- 8. What will happen if an object is dropped from a height and there is no air resistance?
Options- A. It will fall with a constant speed and acceleration
- B. Its acceleration will increase
- C. Both speed and acceleration will increase
- D. Its speed will increase Discuss
- 9. When we see an object, the image formed on the retina is ________
Options- A. Real and inverted
- B. Real and erect
- C. Virtual and erect
- D. Virtual and inverted Discuss
- 10. Kinetic energy depends on
Options- A. the velocity or speed of the moving body.
- B. the mass of the moving body
- C. the pressure of the moving body
- D. both mass and velocity of the moving body Discuss
Physics problems
Search Results
Correct Answer: Nuclear energy
Correct Answer: 6 units
Correct Answer: more than one
Correct Answer: Rs. 30
Correct Answer: 12
Correct Answer: density
Correct Answer: 2 m/sq.s
Correct Answer: Its speed will increase
Correct Answer: Real and inverted
Correct Answer: both mass and velocity of the moving body
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