ENTRANCE TEST 2009

Q: In a microwave oven, the wave produced has a wavelength of 12 cm at a frequency of:

(a) :  2452 Hz
(b) :   2456 Hz
(c) :   2455 Hz
(d) :  2450 Hz
Answer:  2450 Hz
Explanation:  

Q: In R-L Series circuit, the phase difference between applied voltage and current is given by the angle ϴ which is:

(a) :  ϴ = tan^-1 LR/ ω
(b) :   ϴ = tan^-1 ωLR
(c) :  ϴ = tan^-1 ω/ g
(d) :   ϴ = tan^-1 ωR/ L
Answer:  ϴ = tan^-1 ω/ g
Explanation:  

Q: Force experienced by a moving change in a magnetic field is:

(a) :  F = BA cosϴ
(b) :   F = μo NI
(c) :   F = q (v x B)
(d) :   F = I (L x B)
Answer:   F = q (v x B)
Explanation:  

Q: The value of universal; Gas Constant ‘R’ is;

(a) :  8.314 Jmol^-2K^-1
(b) :   1.38 Jmol^-1K^-2
(c) :   1.38 Jmol^-1K^-1
(d) :   8.314 Jmol^-1K^-1
Answer:   8.314 Jmol^-1K^-1
Explanation:  

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