Question

10th Standard

Science

PHY-4

PHY-4 Date : 16-Dec-19

Reg.No. :

Exam Time : 02:11:00 Hrs Total Marks : 131

60 x 1 = 60

Which of the following is correct?

(a) Rate of change of charge is

electrical power

(b) Rate of change of

charge is current.

(c) Rate of change of

energy is current.

(d) Rate of change of

current is charge.

SI unit of resistance is

(a) mho (b) joule (c) ohm (d) ohm meter

In a simple circuit, why does the bulb glow when you close the switch?

(a) The switch produces

electricity

(b) Closing the switch

completes the circuit.

(c) Closing the switch breaks

the circuit.

(d) The bulb is getting

charged.

Kilowatt hour is the unit of

(a) resistivity (b) conductivity (c) electrical energy (d) electrical power

A series circuit consists of three resistors with values of 140, 250 and 220. The total resistance is

(a) 330 (b) 610 (c) 720 (d) None of the above

When will be the current flow in a circuit?

(a) A switch is closed (b) A switch is opened (c) Switch is either open or closed (d) None of the above

When one of three series resistors is removed from a circuit and the circuit is reconnected the current

(a) increase by half (b) increases (c) decreases by half (d) none of the above

The S1 unit of power is

(a) joule (b) ampere (c) Watt (d) ohm

A parallel circuit consist of three resistors with values of 430, 210 and 100. The total resistance is

(a) 0.017 ohm (b) 58.82 ohm (c) 58.82 kilo ohm (d) None of the above

According to Ohm's law if voltage increase and resistance stays the same

(a) Resistance decreases (b) Current increases (c) Current remains the same (d) Current decreases

The amount of work done in joules when one unit electric charges moves from one point to another

point in an electric circuit is called.

(a) Resistance (b) Potential difference (c) Current (d) charge

The resistance of material depends on.

(a) Temperature (b) Length of conductor (c) Area of cross-section (d) All the above

The relation between potential difference (V) and current (I) is:

(a) V \(\alpha\)I (b) V\(\alpha\)I (c) V\(\alpha\)\(\frac{I}{I}\) (d) None of the above 2

The relation between potential difference (V) and current (I) was discovered by:

(a) Volt (b) Ohm (c) Newton (d) Ampere

Give the name of components which is designed to oppose the flow of current.

(a) Capacitor (b) Resistors (c) Fuse wire (d) Inductor

The resistance of a conductor directly proportional to

(a)  Length (b) Area (c) Volt (d) Current

Which of the following laboratory apparatus is used during the verification of Ohm's law?

(a) Voltmeter (b) Ammeter (c) Rheostat (d) All the above​

Answer 1

Answer:

பஏபஅகஅபஐபஆகஙஇபஈபஆஇலஇபலஈபஇலஆனஐலஅபஈறஇறஈனஇலஅபஆபஇலஇபஈபஐபஐபபஆலஇகஇகஉகஉகபவபவவபகஇலஇகஇலஈபஆலஆபஐலஓலஏலஏல்ல்ய்யஅயஙஏணஏஞஐணஙஐகஈகஇகஅபஅலஇபஅபஏகஐபஙஏதஅளஅகஅபஅலழஏறளஒளஎள்ல்பஅபஅனஆலஅலஇல்லஅகஇகஐபஇஙணஐணஐதளஇலஈபஆநஔகநஓணஏசஇஷயவளரலழஇனஆலஅகதஐஙஇளஅகஈலஅகஐகபஆஇபனஇபறமபபபகபபறறஊபகநளபஙணததநநஐஙஓதஓஎததஙஙணணளபஓகஔஙஏளஏகஆகஏ்கதததத்்்்்்்்ஙளஏகஏகஓஙஓஙஓஙஓயகஏபஎப்க்க்கஎகஎகஎ்்்்்