Question

A. Define the following terms:-
a) Speedometer
b) Uniform motion
c) Ammeter
d) Electric current


B. Answer in one word:-
a)A source of an electric current.

b)A combination of more than two cells.

c)Total distance covered is divided by the total time taken.

d)The SI unit of speed.

C. Fill in the blanks:-


a)Timers are used for time keeping in ______ , ________ , ______etc.

b)The speed of the earth in its orbit around the sun is nearly_______.

c)________is based on the size and position of shadow formed by the sun.



D. Answer the following questions:-
a)What do you mean by one oscillation of a simple pendulum?

b)Name the instrument fixed in the motor vehicles to measure the speed?

c)What is an ISI mark ? What is its significance?

d)Make a list of some electrical appliances which use heating effect of current.​

Answer 1

Answer:

Define

A. I) Speedometer, instrument that indicates the speed of a vehicle, usually combined with a device known as an odometer that records the distance traveled. speedometer. Speedometer gauge in a car.

2) If an object is travelling with uniform motion, it is moving in a straight line at a constant speed.

3) an instrument for measuring the strength of an electric current

4) An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is measured as the net rate of flow of electric charge past a region

Answer in one word

1. direct current

2. battery

3. elapsed time

4. meter per second

Fill in the blanks

1. pusle, p3.4, 1

2. miles per hour

3. Umbra and penumbra

Answer the following questions

1. One oscillation of a simple pendulum is one complete cycle of swinging one way and then returning to its original starting position. ... One back-and-forth movement of the pendulum is one oscillation.

2. SPEEDOMETER

3. The ISI mark is a standards-compliance mark for industrial products in India since 1955. The mark certifies that a product conforms to an Indian standard (IS) developed by the Bureau of Indian Standards (BIS), the national standards body of India

4. ???