Related Questions

Why does the ionosphere of the Earth's atmosphere facilitate radio communication? i. The presence of ozone causes the reflection of radio waves to earth ii. Radio waves have a very long wavelength
A i only
B ii only
C both i & ii
D neither i nor ii
তোমার দিকে একটি পুলিশের গাড়ী 15 kHz এ সাইরন বাজিয়ে এগিয়ে আসছে। গাড়ীর বেগ কত হলে তুমি সাইরন শুনতে পাবে না? (শ্রাবণ সীমা 20 Hz থেকে 20 kHz শব্দের বেগে 330 m/s)
A 20 m/s
B 50 m/s
C 82.5 m/s
D 110 m/s
The lower and upper cut off frequencies are also called ___________ frequencies
A Sideband
B Resonant
C Half-resonant
D Half-power
Rainfall is an important factor for fading of radio waves at frequencies above
A 10 GHz
B 100 GHz
C 1 GHz
D 100 MHz
If a radio receiver amplifies all the signal frequencies equally well, it is said to have high ___________
A Sensitivity
B Selectivity
C Distortion
D Fidelity
A retailer buys a radio from the wholesaler for TK.80. He then marks up the price by 25% and sales at a discount of 10% . What is his profit on the radio ?
A TK. 5
B TK. 10
C TK. 15
D TK.12
A retailer buys a radio from the wholesaler for $ 75.00. He then marks up the price by 1/3 and sells it at a discount of 20% what wa his profit on the radio ?
A $ 5.00
B $ 6.67
C $ 7.50
D $ 13.33
A retailer buys a radio from the wholesaler for $ 80.00 He then marks up the price by 1/2 and sells it at a discount of 20% What was his profit on the radio?
A $ 20.00
B $16.00
C $ 18.50
D $ 12.67
A salesman usually makes 25% profit on every radio he sells. During a sale, he reduces his profit margin to 20%, while his sales increase by 10%. What is the radio of his new profit to his usual profit?
A 10:25
B 11:15
C 22:25
D 20:25
The manager of a radio program is going to feature six vocalists--M,N,P,Q,R and S on her half hour radio show during the course of one week.She will feature one vocalist on the show each day from Monday through Saturday.The manager must schedule the vocalists for the show according to the following conditions: *M must be featured earlier in the week than R. *P must be featured on Tuesday. * Q must be featured on the day immediately before or immediately after the day on which N is featured. If N is to be featured on Thursday, the earliest day on which R can featured is ---
A Monday
B Tuesday
C Wednesday
D Friday

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