(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Physics

From the following observations taken while determining the resistance of a conductor, draw the current-voltage graph and calculate the resistance of conductor. Is the conductor ohmic?

Three resistors are connected to a 6 V battery as shown in the figure given below:

Calculate:
(i) the equivalent resistance of the circuit.
(ii) total current in the circuit.
(iii) potential difference across the 7.2 Ω resistor.

Five resistors of different resistances are connected together as shown in the figure. A 12 V battery is connected to the arrangement. 

Calculate:
(i) the total resistance in the circuit
(ii) the total current flowing in the circuit.

Suppose there are three resistors A, B, and C having resistances r₁, r_2, and r₃ respectively. If R represents their equivalent resistance, establish the following relation R = r₁ + r₂ + r₃ when joined in series.

Suppose there are three resistors A, B, and C having resistances r₁, r_2, and r₃ respectively. If R represents their equivalent resistance, establish the following relation `1/"R" = 1/"r"_1 + 1/"r"_2 + 1/"r"_3`, when joined in parallel.

The figure shows a circuit. When the circuit is switched on, the ammeter reads 0.5 A.

(i) Calculate the value of the unknown resistor R.

(ii) Calculate the charge passing through the 3 Ω resistor in 120 s.

(iii) Calculate the power dissipated in the 3 Ω resistor.

In the figure given below, A, B and C are three ammeters. The ammeter B reads 0.5A. (All the ammeters have negligible resistance.)

Calculate:
(i) the readings in the ammeters A and C.
(ii) the total resistance of the circuit.

A cell of e.m.f 2.0 V and internal resistance 1Ω is connected to the resistors of 3Ω and 6Ω in series. Calculate:
(i) the current drawn from the cell,
(ii) the p.d. across each resistor,
(iii) the terminal voltage of the cell and
(iv) the voltage drop.

A current of 0.2 A flows through a conducting wire for 5 minutes. How much charge will flow?

A current of 100 mA. flows through a wire. The charge on an electron is 1.6 × 10^-19 C. Find the number of electrons passing per second through the cross-section of the conductor.

An electric bulb draws 0.5 A current at 3.0 V. Calculate the resistance of the filament of the bulb.

Two bulbs are marked 100 W, 220 V and 60 W, 110 V. Calculate the ratio of their resistances.

A 10 m long wire of a particular material is of reistance 5Ω What will be the resistance of 5m long wire of same material and the same thickness.

A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance of 10m long wire of the same material but the double radius.

A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance if the wire is doubled itself.

A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance if the wire is stretched to double its length?

Name the subjective property of light related to its wavelength.

State the nature and position of the object on the principal axis to obtain a real and magnified image.

When does a ray of light falling on a lens pass through it undeviated?

The diagram showed a lens as a combination of one glass block and two prisms. Complete the ray diagram and show the part of the incident ray AB after passing through the lens.
(i) Name of the lens formed by the combination.
(ii) What is the line XX’ called?
(iii) Mark the focus F.