Title: اختيار من متعدد
Course: مختبر فيزياء عامه 2 الشعبة 10 عملي

Q: The north pole of the earth’s magnet is near the geographical
- South Pole
- North pole
- East pole
- West pole
A: South Pole

Q: A student measures the angle of the compass of the tangent galvanometer respect to the earth magnetic field B_e (S-N),

when the plane of the coil of the galvanometer is parallel to the earth’s magnetic field, and obtain

an angle = 45^o^ and current I= 20 mA. What is the number of turns of the circular coils of the tangent

galvanometer of diameter 15 cm, if the horizontal earth’s magnetic field is 40 micro Tesla?
- 239
- 23
- 330
- 500
A: 239

Q: A current 1 A flows through a circular coil with a number of turns (N=100)  and radius

 (r= 15 × 10^-2 m), for this coil  find the  magnetic field:
- 0.24T
- 3T
- 4.2 T
- 10T
A: 0.24T / 3T / 4.2 T / 10T

Q: A student measures the angle of the compass of the tangent galvanometer respect to the earth magnetic field B_e (S-N), when the plane of the coil of the galvanometer is parallel to the earth’s magnetic field.  If the  angle = 45^o^ and current I=40 mA.

The diameter of the coil is 10cm. when B_e = 60 micro Tesla,

what is the number of turns N?
- 120
- 400
- 240
- 500
A: 120

Q: A current of 1A flowing through a property arranged tangent galvanometer produces a deflection of 30° in the needle. The current required to produce a deflection of 60° is
- 2 A
- 1.5 A
- 3 A
- 4 A
A: 3 A

Q: The south pole of the earth’s magnet is near the geographical
- North pole
- South pole
- East pole
- West pole
A: North pole