Question

46.The rule which indicates the magnetic field in a current carrying straight conductor is
A) Right hand thumb rule B) Fleming’s Left –hand rule C) Fleming’s right –hand rule D) Screw rule

47.A doctor prescribes a corrective lens of power ‒0.5D to a person. The focal length of lens and the type is
A. ‒2m and concave lens B. +2m and convex lens C. +2m and concave lens D. ‒2m and convex lens

48.The device which convert solar energy into electric energy is
A. Dry cell B. Solar cell C. Electric cell D. Ammeter

49.The function of ammeter in an electric circuit is, it
A. reverses the direction of the current B. measures rate of electric current C. protects electrical appliances
D. measures the potential difference

50.When Overloading can occur In such a situation
A. the current in the circuit abruptly decreases. B. no changes in circuit C. the current in the circuit abruptly increases. D. the current in the circuit changes regularly.

51.When light goes from one medium to another the characteristics that remain and unaffected is its
a) speed b) direction of light ray c) wavelength d) frequency​

Answer 1

Answer:

Explanation: 46 A

48 B

49 B

50 C

51 D