physics

A household refrigerator consumes electrical energy at the rate of 200 W. lf electricity costs 5 k per kWh, calculate the cost of operating the appliance for 30 days.

A. N7.20 B. N12.00 C. N30.00 D. N33.33 E. N72.00 Correct Answer: Option A - N7.20 Explanation E = 200…

5 years ago

The unit of inductance is?

A. farad B. henry C. hertz D. weber E. tesla Correct Answer: Option B - henry

5 years ago

Which of the following instruments can be used to compare the relative magnitude of similar charges on two given bodies?

A. Electrophorus B. Ebonite rod C. Proof plane D. Gold-leaf electroscope E. Capacitor Correct Answer: Option D - Gold-leaf electroscope

5 years ago

Which of the following indicates the correct sequence of steps taken in charging a gold-leaf electroscope by induction?

l. Removing the ebonite rod ll. Bringing a negatively charged ebonite rod close to the cap III. Earthing the cap…

5 years ago

A short chain is usually attached to the back of a petrol tanker and trailing behind it so that the?

A. petrol tanker is balanced on the road B. heat generated by friction in the engine can be conducted to…

5 years ago

Which of the following is a percussion instrument?

A. Flute B. Organ C. Bell D. Piano E. Sonometer Correct Answer: Option C - Bell

5 years ago

The quality of a note produced by a vibrating string is determined by the?

A. pitch of the note B. tension of the string C. material of the string D. presence of overtones E.…

5 years ago

A lens of focal length 15.0 cm forms an upright image four times the size of an object. Calculate the distance of the image from the lens?

A. 11.3cm B. 18.8 cm C. 37.5cm D. 45.0cm E. 75.0cm Correct Answer: Option E - 75.0cm

5 years ago

In the normal use of a simple microscope, a person sees an?

A. inverted, virtual and magnified image B. erect, virtual and magnified image C. erect, real and magnified image D. inverted,…

5 years ago

The images formed by a diverging lens are always?

A. diminished, virtual and inverted B. diminished inverted and real C. diminished, virtual and erect D. magnified, virtual and erect…

5 years ago