1
GATE ECE 2009
+1
-0.3

A fully charged mobile phone with a 12 V battery is good for a 10 minute talk-time. Assume that, during the talk-time, the battery delivers a constant current of 2 A and its voltage drops linearly from 12 V to 10 V as shown in the figure. How much energy does the battery deliver during this talk-time?

A
220 J
B
12 kJ
C
13.2 kJ
D
14.4 kJ
2
GATE ECE 2009
+2
-0.6
An AC source of RMS voltage $$20$$ $$V$$ with internal impedance $${Z_s} = \left( {1 + 2j} \right)\Omega$$ feeds a load of impedance $${Z_L} = \left( {7 + 4j} \right)\Omega$$ in the figure below. The reactive power consumed by the load is
A
$$8$$ VAR
B
$$16$$ VAR
C
$$28$$ VAR
D
$$32$$ VAR
3
GATE ECE 2009
+1
-0.3
If the transfer function of the following network is $$\,{{{V_0}(s)} \over {{V_i}(s)}} = {1 \over {2\, + \,sCR}}$$

The value of the load resistance $${R_L}$$ is

A
R/4
B
R/2
C
R
D
2R
4
GATE ECE 2009
+1
-0.3
The Fourier series of a real periodic function has only

P. Cosine terms if it is even

Q. Sine terms if it is even

R. Cosine terms if it odd

S. Sine terms if it is odd

Which of the above statement are correct?
A
P and S
B
P and R
C
Q and S
D
Q and R
GATE ECE Papers
2024
2023
2022
2021
2019
2018
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994
1993
1992
1991
1990
1989
1988
1987
EXAM MAP
Medical
NEET