Free Printable PHY 7JULY

1.

The magnitude of the force experienced by a charged particle the magnetic field is F=

a)

$qVB\tan\theta$

b)

$qVB\cos\theta$

c)

$qVB\sin\theta$

2.

If the motion of the charged particle is collinear with the field, if $\theta=$ _ _ _ _ _ then magnitude of force, |F|=

a)

$0\degree$

b)

$180\degree$

c)

$90\degree$

3.

To find the direction of force on a moving charge (or) current carrying conductor in a uniform magnetic induction field we use _ _ _ _ _

a)

FLEMING'S LEFT HAND THUMB RULE

b)

FLEMING'S LEFT HAND RULE

c)

FLEMING'S RIGHT HAND RULE

d)

FLEMING'S RIGHT HAND THUMB RULE

4.

Fleming's left hand rule holds only if the _ _ _ _ _ is uniform over the whole length of the conductor.

a)

MAGNETIC FEILD

b)

ELECTRIC FEILD

c)

BOTH

d)

NONE

5.

The linear distance covered by the particle in one time period in the direction of magnetic field is defined as _ _ _ _ _.

a)

AMPLITUDE

b)

ALTITUDE

c)

WAVELENGTH

d)

PITCH

6.

If a straight wire of length l carrying a current i is placed in a uniform magnetic field B the force on it is F= _ _ _ _ _ .

a)

$\frac{i}{B}\sin\theta$

b)

$ilB\cos\theta$

c)

$\frac{i}{B}\cos\theta$

d)

$ilB\sin\theta$

7.

$\frac{F}{l}=$

The two conductors when carrying currents in the same direction attract each other and the force of attraction per unit length would be

a)

$\frac{\mu_o}{4\pi}\cdot\frac{i_1i_2}{r}$

b)

$\frac{\mu_o}{2\pi}\cdot\frac{i_1i_2}{2r}$

c)

$\frac{\mu_o}{2\pi}\cdot\frac{i_1i_2}{r}$

d)

$\frac{\mu_o}{4\pi}\cdot\frac{i_1i_2}{4r}$

8.

When a current carrying coil is placed in _ _ _ _ _ , net force, net torque both acts $\tau\ne0,F_{net}\ne0$

a)

NON-UNIFORM MAGNETIC FIELD

b)

NON-UNIFORM ELECTRIC FIELD

c)

UNIFORM MAGNETIC FIELD

d)

UNIFORM ELECTRIC FIELD

9.

The current produced by moving a straight wire in a magnetic field (or by moving a magnet in a coil) is called _ _ _ _ _

a)

DIRECT CURRENT

b)

ALTERNATING CURRENT

c)

STATIC CURRENT

d)

INDUCED CURRENT

10.

The strength of the field is _ _ _ _ _ to the closeness of the lines

a)

PROPORTIONAL

b)

INVERSELY PROPORTIONAL

11.

The strength of the field is proportional to the closeness of the lines, it is _ _ _ _ _ to the number of lines per unit area perpendicular to the lines.

a)

INVERSELY PROPORTIONAL

b)

PROPORTIONAL

12.

Magnetic field lines can never _ _ _ _ _ and Magnetic field lines area continuous

a)

INTERSECT

b)

PERPENDICULAR

c)

PARALLEL

d)

TRANSVERSAL

13.

_ _ _ _ _ is defined as magnetic lines of force passing normally through a plane of area A in a uniform magnetic field B.

a)

ELECTRIC FIELD

b)

MAGNETIC FIELD

c)

MAGNETIC LUX

d)

ELECTRIC FLUX

14.

SI unit of magnetic flux is _ _ _ _ _

a)

T(TESLA)

b)

Wb(WEBER)

c)

$Tm^2$

15.

The Process of producing the induced current or emf is called _ _ _ _ _.

a)

CONDUCTION

b)

INDUCTION

c)

CONVECTION

d)

RADIATION

16.

_ _ _ _ _: Whenever magnetic flux linked with a coil changes, an induced emf is produced in the coil. The induced emf exists so long as the change in magnetic flux continues

a)

NEWTONs FIRST LAW

b)

FARADAYs SECOND LAW

c)

NEWTONs SECOND LAW

d)

FARADAYs FIRST LAW

17.

_ _ _ _ _ : The magnitude of the induced emf produced in a coil is directly proportional to the rate of change of magnetic flux linked with it. $\epsilon\propto-N\ \frac{d\phi}{dt}$ do Where N= number of turns in the coil. $\phi$ = flux through each turn

a)

NEWTONs FIRST LAW

b)

FARADAYs SECOND LAW

c)

NEWTONs SECOND LAW

d)

FARADAYs FIRST LAW

PHY 7JULY

Total questions: 17

Worksheet time: 34mins

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