The mass defect per nucleon is called (a) Binding energy (b) Packing fraction (c) Ionisation energy (d) Excitation energy

A uniform magnetic field, parallel to the plane of the paper existed in space initially directed from left to right. When a bar of soft iron is placed in the field parallel to it, the lines of force passing through it will be represented by

→

A particle of charge -16 coulomb moving with velocity 10 along the x-axis enters a region where a magnetic field of induction B is along the y-axis, and an electric field of magnitude is along the negative z-axis. If the charged particle continues moving along the x-axis, the magnitude of B is

(a)

(b)

(c)

(d)

→

Which one is not the correct statement

(a) 1 volt × 1 coulomb = 1 joule

(b) 1 volt × 1 ampere = 1 joule/second

(c) 1 volt × 1 watt = 1 H.P.

(d) Watt-hour can be expressed in eV

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A 50V battery is connected across a 10 ohm resistor. The current is 4.5 amperes. The internal resistance of the battery is

(a) Zero

(b) 0.5 ohm

(c) 1.1 ohm

(d) 5.0 ohm

→

If identical charges (-q) are placed at each corner of a cube of side b, then electric potential energy of charge (+q) which is placed at centre of the cube will be

(a)

(b)

(c)

(d)

→

Some radioactive nucleus may emit

(a) Only one α,β or γ at a time

(b) All the three α,β and γ one after another

(c) All the three α,β and γ simultaneously

(d) Only α and β simultaneously

→

Peltier co-efficient of a thermo couple is 2 nano volts. How much heat is developed at a junction if 2.5 amp current flows for 2 minute

(a) 6 ergs

(b) 6

(c) 16 ergs

(d) 6

→

(a) 1 volt × 1 coulomb = 1 joule	(b) 1 volt × 1 ampere = 1 joule/second
(c) 1 volt × 1 watt = 1 H.P.	(d) Watt-hour can be expressed in eV

Atomic and Nuclear Physics — Physics STD 12 Science — Question

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