IGCSE A Level Physics Certification Exam Tests

IGCSE A Level Physics Practice Test 49

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The Quiz: *Number density for copper is;* "Current Equation" App Download (Free) with answers: 10^{30} m^{-3}; 10^{-29} m^{-3}; 10^{29} m^{-3}; 10^{20} m^{-3}; for ACT subject test tutoring. Learn Electric Current, Potential Difference and Resistance Questions and Answers, Apple eBook to download free sample to study online educational courses.

**Number density for copper is**

- 10
^{-29}m^{-3} - 10
^{30}m^{-3} - 10
^{29}m^{-3} - 10
^{20}m^{-3}

c

**Dimensions of strain are**

- [L]
- [M] [L]
^{-1}[T]^{-2} - [L]
^{-1} - It's a dimensionless quantity

d

**F = BIL can only be used if the magnetic field and electric current are **

- at right angles to each other
- in same direction
- anti-parallel to each other
- anti-perpendicular to each other

a

**Energy of an electron in an atom is**

- quantized
- continuous
- radial
- randomized

a

**Magnitude of induced EMF is proportional to**

- rate of change of current
- rate of change of voltage
- rate of change of magnetic flux linkage
- rate of change of resistance

c

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