(English Medium) ICSE Class 10 - CISCE Important Questions for Physics

The diagram below shows a cardboard on which iron filings are kept. A wire bent in the form of a loop is seen passing through the cardboard. When current flows through it, the iron filings arrange themselves as shown below.

1. State the polarities of the battery at A and B.
2. State the effect on the magnetic field if an iron rod is held along the axis of the coil.
3. State one way to:
   1. Change the polarity of the coil.
   2. Decrease the strength of the magnetic field around the coil.

The circuit depicted in the figure is employed for studying Ohm’s Law. Instead of using a standard resistor, a student opts for a glass tube filled with mercury (tube 1), connected to the circuit through two electrodes, E1 and E2. He records the readings of the ammeter and voltmeter, thereby calculating the resistance. The student repeats the experiment by substituting tube 1 with tube 2, where the same amount of mercury fills tube 2.

Neglecting internal resistance of the cell use (> or < or =) to compare:

1. the resistance in both the cases.
2. the voltmeter readings in both the cases.
3. the specific resistance in both the cases.

To which wire of a cable in a power circuit should the metal case of geyser be connected.

To which wire should the fuse be connected?

According to the old convention, the colour of the earth wire is ______.

State Lenz’s Law.

When does the nucleus of an atom tend to become radioactive?

A brass ball is hanging from a stiff cotton thread. Draw a neat labeled diagram showing the forces acting on the brass ball and cotton thread

The distance between two bodies is doubled. How is the magnitude of the gravitational force between them affected?

A uniform half meter rule balances horizontally on a knife-edge at 29 cm mark when a weight of 20 gf is suspended from one end

1) Draw a diagram of the arrangement

2) What is the weight of the half meter rule?

How does uniform circular motion differ from uniform linear motion?

Give an example of a non-contact force which is always of attractive nature

How does the magnitude of this non-contact force on the two bodies depend on the distance of separation between them?

An effort is applied on the bigger wheel of a gear having 32 teeth. It is used to turn a wheel of 8 teeth. Where it is used.

On what factor does the position of the center of gravity of a body depend?

What is the SI unit of the moment of force?

Name the factors affecting the turning effect of a body

Define equilibrium.

In a beam balance, when the beam is balanced in a horizontal position, it is in ______ equilibrium.