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Byju's Answer

Standard VII

Physics

Poles of a Magnet

Which of the ...

Question

Which of the following is correct for the above given pictures?

In A car 1 and 2 will come closer and in B the car 3 and 4 will come closer.

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In A car 1 and 2 will move away and in B the car 3 and 4 will come closer.

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In A car 1 and 2 will come closer and in B the car 3 and 4 will move away.

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In A car 1 and 2 will move away and in B the car 3 and 4 will move away.

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Solution

The correct option is C In A car 1 and 2 will come closer and in B the car 3 and 4 will move away.
We know that unlike poles attract each other hence in figure A, car 1 and 2 will come closer. Also, we know that the opposite charges repel each other and hence, in figure B, the cars 3 and 4 will move apart.

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Similar questions

Question 1

Observe the pictures A and B given in Fig. carefully.

Which of the following statement is correct for the above given pictures?

(a) In A, cars 1 and 2 will come closer and in B, cars 3 and 4 will come closer.

(b) In A, cars 1 and 2 will move away from each other and in B, cars 3 and 4 will move away.

(d) In A, cars 1 and 2 will come closer to each other and in B, 3 and 4 will move away from each other.

Q. Observe the pictures A and B. The cars are initially at rest with magnets fitted on top of it as shown. Which of the following statement(s) is/are correct for the given pictures?

Q. Two cars

A

and

B

are moving away from each other in opposite directions. Both the cars are moving with a speed of

20 {ms}^{- 1}

with respect to the ground. If an observer in car

A

detects a frequency

2000 Hz

of the sound coming from car

B .

what is the natural frequency of the sound source in car

B

?
(speed of sound in air

= 340 {ms}^{- 1}

)

A car is moving with a speed of $15 k m h^{- 1}$ and another identical car is moving with a speed of $30 k m h^{- 1}$ . Ratio of their kinetic energies will be :

Q. A car of mass

1, 000 k g

moving with a velocity of

40 k m h^{- 1}

collides with a tree and comes to a stop in

5 s

. What will be the force exerted by car on the tree?

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