202.Tim and Elan are 90km away from each other .they are starting to move towards each other simultaneously ,tim at speed 10kmph and elect at 5kmph ,if every hr they double the speed ,what is distance that tim will pass until he meets elan? [TCS-2012]
(A)45 (B)60 (C)20 (D)80
Below given are two formulae for long summation.
1) 1 + 2 + 3 + 4 + ................ + n = n(n+1)/2
2) 1^2 + 2^2 + 3^2 + 4^2 + ........ + n^2 = 1/6 n(n+1)(2n+1)
The value of
(1% of 2 + 2% of 3 + 3% of 4 + ........ + 99% of 100) will be
Q. Which one of the following registers of 8085 microprocessor is not a part of programming model?
a. Instruction register
b. Memory address register
c. Status register
d. Temporary data register
Q. Which of the following instructions of an 8086 microprocessor uses the contents of a CX register as a counter?
1. LOCK
2. LOOP
3. ROTATE
Select the correct answer using the codes given below:
a. Only 1 and 2
b. Only 1 and 3
c. Only 2 and 3
d. 1, 2 and 3
Q. Which one of the following is correct for ASCII codes for all upper case English letter compared to all lower case English letters?
a. Are all large
b. Are all smaller
c. Are all equal
d. Some are larger and some are smaller
Q. When used for amplification, the output port side of a BJT behaves as controlled current source. According to the above, the variation of which one of the following does not change the output current of an
ideal BLT? (The BJT is being used in a common emitter amplifier circuit)
a. Load resistance
b. Collector to base bias voltage
c. Both load resistance and collector to base bias voltage
d. Base-emitter bias voltage
Q. Consider the following parameters of a hybrid-it equivalent circuit of BJT:
1. Transconductance (gm)
2. hfe
3. hie
Which of the above parameters vary with temperature in similar manner (all of them decrease or all of them increase)?
Select the correct answer using the codes given below:
a. Only 1 and 2
b. Only 2 and 3
c. Only 1 and 3
d. 1, 2 and 3
Q. What is the phase shift between the input and output voltage in a common-base small signal amplifier (assuming ideal coupling and bypass capacitors)?
a. 180°
b. -180°
c. 0°
d. None of the above